Sure. I reinstalled the V4 app again. I had reinstalled it twice on day one with repeated no connects. Each time it asked for the device address shown in the n200 display. I entered the address and got a message something like "that is not the aurender address" V3 immediately connected. V4 reinstalled still would not.
Today V4 immediately connected. I shut the n200 down a few times, closed and reopened the app a few times, looked around in the app. V4 seems normal and stable.